Effects of chronic exposure to toxic metals on haematological parameters in free-ranging small mammals

Powolny, Thibaut; Scheifler, Renaud; Raoul, Francis; Fritsch, Michaël Coeurdassier Clémentine

doi:10.1016/j.envpol.2022.120675

Cited by 9 publications

(2 citation statements)

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“…Hepatic Se concentrations were higher in individuals from High than Low sites (t = 4.4, df = 8.5, p = 0.002, Table 2). A similar result was observed in a previous study over the same area (Powolny et al, 2022). Peraza et al (1998) hypothesised that Se, which is involved in a protective role against the toxicity of metals, would be preferentially taken up and/or accumulated in animals exposed to Cd and Pb.…”

Section: Variations Of Liver Trace Metal Concentrations Between Pollu...supporting

confidence: 85%

“…In a previous study, we found that wood mice (Apodemus sylvaticus) free-ranging populations exposed to elevated levels of soil pollution by cadmium (Cd) and lead (Pb) had higher hepatic Se concentrations than control populations. We also found positive relationships between Se concentrations and haematological parameters (Powolny et al, 2022), suggesting that Se might play a protective role against Cd and/or Pb toxicity. In laboratory controlled conditions, Se has been shown to counteract immunosuppression as well as hepatic and renal oxidative damage induced by cadmium in orally exposed rats (El-Boshy et al, 2015).…”

Section: Introductionsupporting

confidence: 54%

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Environmental pollution and nutritional quality modulate immune response of the wood mouse (Apodemus sylvaticus) through hormonal disturbances

Devalloir,

Fritsch,

Alchammas

et al. 2023

Environmental Pollution

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Section: Variations Of Liver Trace Metal Concentrations Between Pollu...supporting

confidence: 85%

Section: Introductionsupporting

confidence: 54%

Environmental pollution and nutritional quality modulate immune response of the wood mouse (Apodemus sylvaticus) through hormonal disturbances

Devalloir,

Fritsch,

Alchammas

et al. 2023

Environmental Pollution

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Essential mineral elements in roe deer: Associations with parasites and immune phenotypes in two contrasting populations

Bariod,

Saïd,

Calenge

et al. 2024

Ecology and Evolution

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Low levels of essential mineral elements such as cobalt, copper, and iron, in organisms reduce immune function, increasing the chances of parasitic infection. This phenomenon has been demonstrated widely in domestic animals but rarely in wildlife. In this study, we used data from 7‐ to 9‐month‐old roe deer (Capreolus capreolus), living in two different populations facing contrasting environmental conditions (Trois‐Fontaines and Chizé), to investigate whether the parasitic and immunological statuses could be related to essential element status. Between 2016 and 2019, we collected feces to measure parasite burdens (gastrointestinal and pulmonary nematodes), blood to measure immunological parameters (globulins and white blood cells), and hair to assess the concentration of 11 essential elements (calcium [Ca], chromium [Cr], cobalt [Co], copper [Cu], iron [Fe], magnesium [Mg], manganese [Mn], potassium [K], molybdenum [Mo], selenium [Se], and zinc [Zn]). The results showed first heterogeneity in the individual phenotypes of the two populations. Roe deer with low body mass had high concentrations of all the essential elements (in particular, Ca, Fe, Cu, K, and Mn), a high parasitic burden, and high concentrations of globulins. An association between high concentrations of essential elements and a high parasite burden was found at the two study sites despite markedly different environmental conditions. A relationship between essential element concentrations and immune parameters was also detected, with more basophils and globulins being associated with high concentrations of essential trace elements (i.e., Ca, Fe, Cu, and, to a lesser extent, Se, Cr, and Zn). These results suggest that young individuals with low body mass and high parasitism may select feeding resources rich in mineral elements, which may improve their ability to control the infestation and/or mitigate the negative consequences of parasites by maintaining immune system functions.

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Natural mercury exposure of European insectivorous bats may exceed a recognized toxicity threshold

Bandouchova,

Novotna Kruzikova,

Zukal

et al. 2024

Ecotoxicology

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Heavy metals are an important group of toxic substances harmful for many organisms. Of these, mercury is one of the most monitored in the environment. Several matrices are used for the monitoring of environmental load, including a range of organisms; bats, however, have only been examined rarely. Insectivorous bats are apex predators threatened by several human interventions in their natural environment, including heavy metal pollution. The aim of this study was to analyze the content of total mercury in the fur, flight membrane, and pectoral muscle of greater mouse-eared bats (Myotis myotis). Total mercury concentrations were also measured in carabid beetles from the catch locality Zastávka u Brna. Samples were obtained from 43 bat carcasses at two different localities in the Czech Republic (Zastávka u Brna, Malá Morávka). Total mercury content varied between 1.76–72.20 µg/g in fur, 0.04–0.14 µg/g in skin, and 0.05–0.20 µg/g in muscle. Total mercury values in the fur of some individuals from Malá Morávka exceeded the recognized toxicity limit. Furthermore, there was a significant difference (p < 0.001) in content of total mercury in fur between localities, and there was a clear effect of age on concentrations in fur, skin, and muscle, the concentrations being significantly correlated (fur and skin rs = 0.783; fur and muscle rs = 0.716; skin and muscle rs = 0.884). These findings confirm the usefulness of fur samples from living bats for biomonitoring mercury burden in the environment.

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Effects of chronic exposure to toxic metals on haematological parameters in free-ranging small mammals

Cited by 9 publications

References 70 publications

Environmental pollution and nutritional quality modulate immune response of the wood mouse (Apodemus sylvaticus) through hormonal disturbances

Environmental pollution and nutritional quality modulate immune response of the wood mouse (Apodemus sylvaticus) through hormonal disturbances

Essential mineral elements in roe deer: Associations with parasites and immune phenotypes in two contrasting populations

Natural mercury exposure of European insectivorous bats may exceed a recognized toxicity threshold

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